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Now showing 1 - 10 of 272
  • Article
    On the Definition of Sequential Consistency
    (Elsevier Science Bv, 2005) Sezgin, A; Gopalakrishnan, G
    The definition of sequential consistency is compared with an intuitive notion of correctness. That the definition is not strong enough is illustrated through a hypothetical memory system which is clearly incorrect, yet sequentially consistent. It is claimed that the reason for this is the absence of a relation between what actually happens (temporal order) and what seems to happen (logical order). A stronger version of sequential consistency is proposed. (c) 2005 Elsevier B.V. All rights reserved.
  • Article
    Citation - WoS: 2
    Citation - Scopus: 4
    State-Based Conceptual Design in Mechatronics Via Petri Nets: a Case Study for an Educational Robot
    (Romanian Soc Control Tech informatics, 2011) Erden, Zuhal; Mechatronics Engineering
    Use of state-based models to represent artifact behaviors at conceptual design is a challenging area for design research. Conceptual design of mechatronic systems needs a multi-domain approach in which the "logical behavior" of a mechatronic design artifact is described without any physical realization. This paper presents a case study on state-based representation for the intended behavior of a non-existent robot at early conceptual level. The behavior is defined through a demonstrative scenario and represented as states and state transitions independent of any physical embodiment. Discrete Event System Specification (DEVS) and Petri Net formalism are used for the model. This representational model is first step towards the development of a virtual prototype for the logical behavior of robot design.
  • Article
    Minorities and Minority Rights in Europe
    (Ankara Univ European Union Research Centre, 2015) Yilmaz, Gozde
    Europe has been the home for various ethnic, linguistic and religious minority groups for decades and it is almost impossible to find an European country with ethnic, linguistic and religious homegeneity. Notably, conflicts in Europe after the Cold War demonstrated the importance of minority issues and minority rights for Europe. In this respect, the European organizations like the European Union or the Council of Europe actively seek to promote minority rights in Europe. Especially through the enlargement of these organizations, the promotion of minority rights widened its sphere in Europe by minority conditions required to be fulfilled by the candidate countries are for membership. However, there is still no minority standard in Europe like the one in human rights. In contrast, minority rights have still been held by sovereign European states rather than through a common platform.
  • Article
    Citation - WoS: 6
    Synthesis and Biological Study of Novel Indole-3 Derivatives as Src Kinase and Glutathione S-Transferase Inhibitors
    (Bentham Science Publ Ltd, 2013) Kurt, Z. Kilic; Aydin, D.; Isgor, Y. G.; Isgor, B. S.; Olgen, S.
    The aim of this study is to design and synthesize novel dual inhibitors of Src protein tyrosine kinase (PTK) and Glutathione S-transferases (GSTs), as a potential drug lead with therapeutic efficacy on cancer and immune disorders. The biological activity profiling of small molecule inhibitors via miniaturized biochemical techniques compatible with medium throughput screening and focused screening methodologies were performed. To determining the effects of small molecule inhibitors on Src kinase and Phase II detoxification enzyme GST isozymes in liver homogenates used to verify their roles in drug resistance mechanism for cancer chemotherapeutics. In this study, 14 indole-3-imine-2-on and N-benzyl indole-3-imine-2-on derivatives were synthesized for dual activities against Src and GST. The chemical structures and purities of compounds were verified by IR, H-1 NMR, MASS spectroscopy, and elemental analysis. The compounds 2, 3 and 9 are found slightly active against both enzyme Src and GST.
  • Article
    Citation - WoS: 4
    Citation - Scopus: 6
    A Test Bench To Study Bioinspired Control for Robot Walking
    (Romanian Soc Control Tech informatics, 2011) Arikan, Kutluk B.; Irfanoglu, Bulent; Department of Mechatronics Engineering
    Test bench to study robot walking within the predicted structures of biological control systems is discussed. Physical system is briefly presented with components. Kinematic model and evolutionary way of gait generation for the leg structure in test bench is discussed. Different forms of gaits can be found by genetic optimization using patterns formed by central pattern generators.
  • Article
    Citation - WoS: 12
    Citation - Scopus: 15
    Discrete Parameter-Nonlinear Constrained Optimisation of a Gear Train Using Genetic Algorithms
    (inderscience Enterprises Ltd, 2005) Dolen, M.; Kaplan, H.; Seireg, A.
    This paper investigates the optimal design of a four-stage gear train using genetic algorithms. Five different genetic encoding schemes, which incorporate various heuristic search techniques, are proposed to deal with the most critical constraints of the problem. The fitness criterion used by all genetic algorithms includes a merit function for minimising the size of the gearbox. The results show improvement in the design merit over previous approaches without reliance on the designer's interaction to avoid geometric constraint violations and facilitate the convergence.
  • Article
    Citation - WoS: 23
    Citation - Scopus: 25
    Comparison of Cellular Proliferation on Dense and Porous Pcl Scaffolds
    (Ios Press, 2008) Sasmazel, Hilal Tuerkoglu; Gumusderelioglu, Menemse; Gurpinar, Aylin; Onur, Mehmet Ali
    In this contribution, PCL (poly-e caprolactone) scaffolds were prepared by solvent-casting/particle-leaching technique in the presence of two pore formers, PEG(4000) or sucrose molecules in different quantities (0, 10, 20, 30, 40, 50, 55 w/w% PEG(4000)/PCL; 10, 20 w/w% Sucrose/ PCL). The surface and bulk properties of the resulting scaffolds were studied by SEM, DSC and FTIR. SEM photographs showed that, macroporosity was obtained in the PCL structures prepared with sucrose crystals while microporous structure was obtained in the presence of PEG(4000) molecules. Average pore diameters calculated from SEM photographs were 40.1 and 191.2 mu m for 40% PEG(4000)/PCL and 10% Sucrose/PCL scaffolds, respectively. The DSC and FTIR results confirmed that there is no any interaction between pore formers and PCL during structural formation, and both pore formers, PEG(4000) and sucrose, remained independently in the scaffolds. L929 mouse fibroblast cells were seeded onto PCL structures and maintained during 7 days to evaluate cell proliferation. Cell culture results showed that, 10% Sucrose/ PCL scaffold was the most promising substrate for L929 cell growth due to 3-D architecture and macroporous structure of the scaffold.
  • Correction
    Influence of Water/O2 Plasma Treatment on Cellular Responses of Pcl and Pet Surfaces (vol 21, Pg 123, 2011)
    (Ios Press, 2011) Sasmazel, Hilal Turkoglu; Aday, Sezin; Manolache, Sorin; Gumusderelioglu, Menemse
    [No Abstract Available]
  • Article
    Citation - WoS: 4
    Citation - Scopus: 5
    Electrical Characterization of Bi1.50-x< Varactors
    (World Scientific Publ Co Pte Ltd, 2014) Qasrawi, A. F.; Abu Muis, Khalil O.; Abu Al Rob, Osama H.; Mergen, A.
    The electrical properties of yttrium doped bismuth zinc niobium oxide (BZN) pyrochlore ceramics are explored by means of temperature dependent electrical conductivity dielectric constant and capacitance spectra in the frequency range of 0-3 GHz. It is observed that the doped BZN exhibit a conductivity type conversion from intrinsic to extrinsic as the doping content increased from 0.04 to 0.06. The thermal energy bandgap of the intrinsic type is 3.45 eV. The pyrochlore is observed to exhibit a dielectric breakdown at 395 K. In addition, a negative capacitance (NC) spectrum with main resonance peak position of 23.2 MHz is detected. The NC effect is ascribed to the increased polarization and the availability of more free carriers in the device. When the NC signal amplitude is attenuated in the range of 0-20 dBm at 50 MHz and 150 MHz, wide tunability is monitored. Such characteristics of the Y-doped BZN are attractive for using them to cancel the positive parasitic capacitance of electronic circuits. The canceling of parasitic capacitance improves the high frequency performance of filter inductors and reduces the common mode noise of the resonance signal.
  • Article
    Citation - WoS: 16
    Citation - Scopus: 17
    Adopting of Agile Methods in Software Development Organizations: Systematic Mapping
    (Assoc information Communication Technology Education & Science, 2017) Abdalhamid, Samia; Mishra, Alok
    Adoption of agile methods in the software development organization is considered as a powerful solution to deal with the quickly changing and regularly developing business environment and fully-educated customers with constantly rising expectation, such as shorter time periods and an extraordinary level of response and service. This study investigates the adoption of agile approaches in software development organizations by using systematic mapping. Six research questions are identified, and to answer these questions a number of research papers have been reviewed in electronic databases. Finally, 25 research papers are examined and answers to all research questions are provided.